The top of the foot is called the dorsal. The bottom of the foot is referred to as the plantar.
The top of the foot has a major tendon called the extensor hallucis longus. This tendon starts in the leg and extends all the way down past the ankle and ends at the big toe. This is the main cord that allows people to use their big toe and flex the ankle. The extensor digitorum longus also runs down the leg and through the foot. This is the tendon that allows all of the other toes on the foot to move freely.